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The development of a whole-head human finite-element model for simulation of the transmission of bone-conducted sound
Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences.
Incheon National University, South Korea.
Linköping University, Department of Clinical and Experimental Medicine, Division of Neuro and Inflammation Science. Linköping University, Faculty of Medicine and Health Sciences.ORCID iD: 0000-0003-3350-8997
2016 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 140, no 3, 1635-1651 p.Article in journal (Refereed) Published
Abstract [en]

A whole head finite element model for simulation of bone conducted (BC) sound transmission was developed. The geometry and structures were identified from cryosectional images of a female human head and eight different components were included in the model: cerebrospinal fluid, brain, three layers of bone, soft tissue, eye, and cartilage. The skull bone was modeled as a sandwich structure with an inner and outer layer of cortical bone and soft spongy bone (diploe) in between. The behavior of the finite element model was validated against experimental data of mechanical point impedance, vibration of the cochlear promontories, and transcranial BC sound transmission. The experimental data were obtained in both cadaver heads and live humans. The simulations showed multiple low-frequency resonances where the first was caused by rotation of the head and the second was close in frequency to average resonances obtained in cadaver heads. At higher frequencies, the simulation results of the impedance were within one standard deviation of the average experimental data. The acceleration response at the cochlear promontory was overall lower for the simulations compared with experiments but the overall tendencies were similar. Even if the current model cannot predict results in a specific individual, it can be used for understanding the characteristic of BC sound transmission in general. (C) 2016 Acoustical Society of America.

Place, publisher, year, edition, pages
ACOUSTICAL SOC AMER AMER INST PHYSICS , 2016. Vol. 140, no 3, 1635-1651 p.
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:liu:diva-133011DOI: 10.1121/1.4962443ISI: 000386932500026PubMedID: 27914383OAI: oai:DiVA.org:liu-133011DiVA: diva2:1054671
Note

Funding Agencies|European Union [600933]; Incheon Nation University (International Cooperative) Research Grant

Available from: 2016-12-08 Created: 2016-12-07 Last updated: 2017-01-11

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Chang, YouStenfelt, Stefan
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